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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 820 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.29 × 98 =
  2. 2.10 × 19 =
  3. 3.15 × 29 =
  4. 4.9 × 9 =
  5. 5.13 × 49 =
  6. 6.18 × 98 =
  7. 7.3 × 19 =
  8. 8.11 × 19 =
  9. 9.7 × 49 =
  10. 10.15 × 99 =
  11. 11.5 × 9 =
  12. 12.32 × 98 =
  13. 13.8 × 19 =
  14. 14.12 × 9 =
  15. 15.6 × 9 =
  16. 16.6 × 9 =
  17. 17.8 × 49 =
  18. 18.15 × 19 =
  19. 19.4 × 19 =
  20. 20.14 × 49 =
  21. 21.24 × 99 =
  22. 22.9 × 19 =
  23. 23.11 × 19 =
  24. 24.9 × 49 =
  25. 25.14 × 19 =
  26. 26.11 × 49 =
  27. 27.10 × 29 =
  28. 28.3 × 29 =
  29. 29.6 × 98 =
  30. 30.7 × 19 =
  31. 31.39 × 99 =
  32. 32.7 × 9 =
  33. 33.13 × 29 =
  34. 34.28 × 99 =
  35. 35.13 × 19 =
  36. 36.11 × 98 =
  37. 37.5 × 29 =
  38. 38.38 × 99 =
  39. 39.8 × 9 =
  40. 40.15 × 9 =

Answer key

  1. 2842
  2. 190
  3. 435
  4. 81
  5. 637
  6. 1764
  7. 57
  8. 209
  9. 343
  10. 1485
  11. 45
  12. 3136
  13. 152
  14. 108
  15. 54
  16. 54
  17. 392
  18. 285
  19. 76
  20. 686
  21. 2376
  22. 171
  23. 209
  24. 441
  25. 266
  26. 539
  27. 290
  28. 87
  29. 588
  30. 133
  31. 3861
  32. 63
  33. 377
  34. 2772
  35. 247
  36. 1078
  37. 145
  38. 3762
  39. 72
  40. 135

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